Abstract: The preparation of manganese(II)-phenanthroline complex functionalized MCM-41 was described. The modification of the internal pore surface of mesoporous MCM-41
with 3-aminopropyl or 3-methacryloyloxypropyl and yielded two different functional groups by using 3-aminopropyltriethoxysilane and (3-methacryloyloxypropyl)trimethoxysilane
as the precursors. Manganese(II) phenanthroline complex was grafted onto the functional MCM-41 via the coordination of the metal ion with the functional group. The metal
ion complex functionalized mesoporous materials were characterized by XRD, FTIR, N₂ adsorption/desorption at 77K, solid state diffuse reflectance UV-VIS spectroscopy
as well as electron spin resonance (ESR) at room temperature. After the functionalization, the vibrations such as υC=C, δCH₂ from the organic ligands or Mn(II)
complex can be observed clearly. BET surface area, pore volume and most probably diameter decreased correspondingly according to the data of N₂ sorption at 77K.
In UV-VIS spectra, the absorption at short wavelength was strengthened because of the introduced organic ligands. And the results of ESR suggested that Mn(II)
coordination in complexes didn’t change remarkably.

Key words: mesoporous MCM-41, 3-aminopropyl functional MCM-41, 3-methacryloyloxypropyl functional MCM-41, manganese(II)-phenanthroline complex functionalized MCM-41